[DOC] Update changelog

* This rectifies a duplicate entry for the same fix, but only one entry now contains the associated numbers.

Author: daspk04

CHANGES

@@ -4,10 +4,9 @@ Pint Changelog
 0.25 (unreleased)
 -----------------
 
-- Fix the default behaviour for pint-convert (cli) for importing uncertainties package
+- Fix the default behaviour for pint-convert (cli) for importing uncertainties package (PR #2032, Issue #2016)
 - Added mu and mc as alternatives for SI micro prefix
 - Added ℓ as alternative for liter
-- Fix the default behaviour for pint-convert (cli) for importing uncertainties package (PR #2032, Issue #2016)
 - Support permille units and `‰` symbol (PR #2033, Issue #1963)